Railway car construction



June 14, 1932. EDAHL 1,863,400

RAILWAY CAR CONSTRUCTION Fil ed March 7, 1929 II/II/I/IIIII/II 29 I 2 HZZOTIJZAZ? Patented June 14, 1932 UITED STATES KNU'I'E EDAHL, OF CHICAGO, ILLINOIS RAILWAY CAR Application filed March 7,

This invention relates to railway freight cars and more particularly to cars having roofs, and the object of the invention is to permit movement between the roof framing and the side and end framing, of the car so that the car will flex and weave, which tendency to weave is caused by the car going over uneven track and its inertia against stopping and starting.

Another object of the invention is to provide carlines which are attached to the opposite side plates of the car so as to permit movement therebetween, but at the same time, resist the compressive and tension stresses imposed on the carline by the servlce movements of the car.

In the drawing Fig. 1 shows a carline according to my invention attached to the opposite side plates of the car.

Figs. 2 to 5 inclusive show modified constructions.

Figs. 6, 7 and 8 are diagrams showing some of the various positions the roof may assume in service.

A carline is the roof rafter of a car and as such must transmit the weight of the roof and any load imposed thereon to the opposite side plates of the car, said side plates being the upper frame members of the side wall of the car. The tendency of the roof framing of a car in service is to assume the shape of a parallelogram, as shown in Fig. 6, and when a carline is rigidly attached to the side plates, this movement tends to, and in fact does, break the carlines at a point adjacent the side plates. 'The constant resistance of a carline to this force crystallizes I, the steel so that after a few years in service it snaps.

In my construction I attach a bracket 2 to the side plate 3 and an end piece 4 to the carline 5 which piece is connected to the bracket by a pivot 6, which is preferably tapered, as shown in Fig. 2 so that the member 5 is not only a carline to support the roof but is also a strut-tie between opposite side plates of the car. This construction is particularly adaptable to re-claim old carlines CONSTRUCTION 1929. Serial No. 344,992.

wherein the broken ends are cut off and the end piece riveted thereto.

In the modification shown in Figs. 4 and 5 I provide a conical pintel or hub 7 on the bracket which engages a conical aperture 8 in the end piece so that the bolt 9 is relieved of the stresses and is merely a retaining member.

As these side walls are very deep (about eight feet) compared to their width (about on four inches) they have a tendency to buckle under load and one of the functions of a carline is to prevent suclrbucklingby tying the opposite side walls 12 of the car together. These side walls may both buckle outwardly 66 so that the plan of the roof will assume the position shown in Fig. 7 which would exert a tension upon the carline. The opposite side walls may buckle inwardly, as shown in Fig.

8, which would exert a compression upon '10 the carlincs. The connection between the carline and the side plate is arranged to accommodate both tension and compressive forces. a p

The accompanying drawing illustrates the preferred form of the invention, though it is to be understood that the invention is not limited to the exact details of construction shown and described, as it is obvious that various modifications thereof within the so scope of the claims will occur to persons skilled in the art.

I claim:

1. In a railway car, the combination of a pair of spaced apart parallel side plates, a plurality of brackets secured to each side plate, each bracket provided with an upstanding cylindrical hub, a plurality of carlines, each spanning the distance between A said side plates and provided with a cylindrical aperture adjacent each end thereof engaging a hub of a bracket on the adjacent side plate and supported thereby, and means to retain the aperture in engagement with the hub whereby said side plates may move relative to each other in a horizontal plane but not in a vertical plane relative to each other so that the car may weave in going over uneven track.

2. In a railway car, the combination of a mo pair of spaced apart parallel side plates, a plurality of brackets secured to each side plate, each bracket provided With an upstanding conical hub, a plurality of carlines, each spanning the distance between said side plates and provided with a conical aperture adjacent each end thereof engaging a hub of a bracket on the adjacent side plate and supported thereby, and means to retain the aperture in engagement with the hub whereby said side plates may move relative to each other in a horizontal plane but not in a vertical plane relative to each other so that the car may Weave in going over uneven track.

KN UTE EDAHL. 

